rm SkPreConfig.h and SkPostConfig.h

We treat them as part of SkTypes.h, so let's just merge them in?

Change-Id: Icd6db3913a679ceb9de09027d17eb9361754b016
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/268769
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Reed <reed@google.com>
9 files changed